The responsiveness of the Hupana Slip is due to its full rubberized foam midsole and outsole which certainly adds a bounce to any workout. This performance is enhanced by the four-way stretch mesh upper, which offers support, breathability, and a secure sock-like feel. The upper also has front and back tabs for easy on/off. From high intensity interval training to treadmill work, the Hupana Slip offers reassuring stability while remaining light and agile. The Hupana Slip is a shoe you can wear all day regardless of your activities.